Selector-switch-movement-controlling circuit.



AWE. LUNDELL.

SELECTOR SWITCH MOVEMENT CONTROLLING'CIRCUIT.

Patented Jan. 29,1918.

APPLICATION FILED JAN. 29. 19W.

k? m u Hf 5 am w Lu m ALBEiv n. LUNDEL'L', OF new Ybnitj jjessiqiioitf'fro' nnnorniio consent,

moonronernn, .or new YORK, Y., A CORPORATION on NEW YORK.

= 3'1?! v niL ,vl.1l5.' 1;"I':" 1'

SELECT03 swiii GH-MOVEMENT CONTROI-LQIGCIRCUIT.-

. Switclrllloyement-Controlling ecireuit's, :of

which the following is, a .full, clear, concise;-

and exact description. ;;:i;--

n} 52%? This invention relates to a system-tor .rcon-i trolling. the j movement of selectorswitches;

Its object is to improveiri general the coni-i. struction and arrangen'lent '0f. theuparts :ofthe switch mechanism -used in conjunction with the switch movementscontrolljng.icirn;

v cuit, whereby theinterconnection offa lerg'e number of lines may be cfiected-wyith rapid-: itya-nd precisionnj. Q I Qne feature of the, invention ;-Zresides ;in-: directlyassociating a pairzoii contact springs'a with a. pawl, the'lntter engaging:.a.-'series3of;= slots in a rack which serves zto po'sitionsthee movable parts of ;the switch. :The} contact. springs are operated-by the -m'ov'eme'nt :of; the pawlto sendimpulses whichcontrolthei operating magnets. of the switch -Contacts i are provided for group and-individual. line selection. r i. i Another feature of the inventionjis' directed to the utilization ofthe momentum of the rack or moving brush carriage following the long step group selecting interval'to 0P erate the retaining pawl of the brush car? riage which in turn serves to prepare the. circuit for individual contact selectionin the selected group. I

The invention is illustrated in the accompanying drawings in which Figure 1 shows the circuit of a complete connection in which the selector switch movement controlling circuit is utilized. Fig. 2 illustrates the operating pawls of the connector switch in their normal relation to the rack of the switch and Fig. 3 illustrates the pawls in their operated relation.

In the embodiment of my invention as shown in the dra ing, the invention has been adapted to a semi-automatic system and the connector switch is controlled by any type of sender which is set and operated by the switchboard operator. The invention is not restricted to use with the particular system m: m. r! yin- 1 shown but is grealdily; 'ap

well-known: types of Eautoniatic systems. 9 In E the present-embodiment of the invention the sender disclosed- -.-in.- thepatent to Lundell, X Noi;:.L,'168,-3l9,-= alanuairyel8; 1916, has been used-,ibutitwm besevident that the;inven. tion may! be readily; adapted to i any one of the'wellfzknown types ofsenders, whether of the reverse bndirect impulse sendingv type.-

The invention may best be explain'edby a detailed; description of the operation of the circuit -.shown in; Fig. L- i: When the callingsubscriber removes- :h-is recei vcr from the:

hook he willaoperate theline relay 6 in? the wellknomm manner? which in turn will .illu? minatitlie line. signal; vilihe o'pcraton-upon':

obseryingithe illunii nated line signal will ,insert en i 1 tery.{The o.per-ation ofi-thecut-oii -relay 7 will disassociateithe line signaling apparatus from' the cellingsubs'cribers line and exe tinguish the calling line lamps. The sleevev relay 8 iii-operating will complete a circuit from ground on its armature by way of its make. contact and he-upper left-hand con teeter-sequence switch ring 11 to the sequence switch power magnet 10 and thence to fbattery. ,This will cause the operation of the sequence switch, which will move into In-the second position its second position. ofthe sequence switch-a circuit is closed from ground at the stepping relay 9 of the sender through the break contact and armature of the last counting relay 10 of the sender by way of sequenceswitch spring 12 of the sender and the lower right-hand contact of sequence switch spring 13 and thence through relay 14 [0 battery. The operation of relay 14 will close a circuit from the ground on its right-hand armature by way of its make contact, lower right-hand contect'of sequence switch spring 11 and the power magnet of the sequence switch to battery. The sequence switch will, therefore, move into its third-position. i

In the .third position. of the sequence switch a circuit is closed from battery through-the clutch magnet 15, the upper 'liczible. si ns or as e answer-ingpluginto the jack aS- 1 cented; :with. the displayed signal? .This.

f upward I completed iii-om ground.?ciii1nei:ted

. of relay rlQ of thesenderand'relay -fiiofthe lias heen 1'eset for'the'select1on of individual contacts after the'last counting relay was right-hand contact of sequence switch spring 16 and the make contact; and right-hang;- armature oj'fielay 14 to"ground. i Th'e operzi ation of the clutch magnet 15 will force the. ...eontact selection in the ack .8 agaieslsm l ishpeedsnaeefly; .4 was: hite-lt mesters r elevation" of' the "brasH-iearria ef"The" brush carriage .ifisiunne dimersmentn l s;: cause the movable contacts to sweep over the sttignary contacts-of the contact bank 211 -In tlii apwmtrtnovnent of the" N15 andfiliat bet-ween each two of these long carriage the pawl 24' engagesrtheiserieszof.trslotsnthere of nine short slots elongated slots in the rack 18.' will obsei ved fromwFigz :2; when the pawl =is' rest ing on the suriace'rof tli'e I rack, the contact which with one of the long slots, are equal in number to the- -nun 1 ber"of-contacts in a group: 1;This arrangement of 'slots in the rack: results in a inoveinent of the pawl 24 for-'each'" cup o'f contacts traversed by the contact brushes'iflO Jandwmovement of the pawl=3'0-"for each group of contacts and for ersedby said;bri1shes.f' a; v

Due to' the opening oft-he circuit 'of relay li at ithe oontact -of relay-:10 and at the springs 25 and 26 the relay will" be denergizcd and a circuibf is eloscdfrom the ground at itseiight hand: annature -by way of its b'reali' co'ntajcn lower left-hand contact of sequenceiswitch *spring'11 and the power magnet of-thei-seqnence switch to battery. will i mo verthe" sequence switch into itsifourtli ipositiori". In the fourth position of the sequence switch a circuit-is closed for eachriiidividualroontact' in each" group travthe sequence switch? moved" into its secoiid" -reIay- "1 i2whicli' maybe traced from 'battery position,'=-over a circuit"wIiich niay' be-tracedfrom-battery I througli' tlie "coil of the i elay I the iiiake eonta ctandfleft hand armature 'o' 3 the relayu the contact pf fsequenoe' switch 1 spi-ing- '12,-*- the ar'matur'e" aafl h eak contact? sender to ground: 7 lt; will be observed thatthe locking cit-'- cuit of relay :4 "just traced has-'a'" parallel path to ground from its left-haiid arrf ature whenever the circuit closed byt'h'e' contacts 25 and*26 is operated by thepawl 24. This parallel fcirc 1'iit"-to ground through -the springs 25 and :26 willshunt out'relay'9 of the sender and'deenergize the same, and this relay'will be deinergized each time the pawl 24. engages one of the series of elongated. slots in the rack 18. This number of deenergizations of rela 9 will be 'equ'al'in m'unber tot-he first digit of the'numberfsetup by the operator on the sender. After the' first set of impulses have been sent the last counting relay- #10 of the sender is operated and the fundamental sending circuit is opened at the armature of this relay. The opening of tlie circuit at this contact will open one of the parallel paths of the relay 14. The otherpath through the con-' tact's 25 and "26 will likewise be opened because the momentum acquired by'thebrush carriage in the group selection results in an overthrow suflicient to carry the rack on so through the relayrthe lower right-hand -contact-of; ence!sw-itch spring 13, sequence switch spun g 12 of; the sender, -'the a nun ture of relay 10'and thecoil of relay 9 to ground. Thisclrcuit 'ispoinpleted through-the sender mechanism diie to" the-fact that the'sender denergized at the end of the period during which impulses for group selection wassent.

The-operation of-relay l lcloses a circuit from' 'ground. at the right-hand armature of this relay 'throughits make contact, the lower right hand' contact of sequence switch spring-11 and the power magnet 10 of the thereby preparing the set, utilized in individual contact selection. \Vhen the'relay 14 operated during the time the sequence switch was in position 4 itclosed for itself a locking circuit, which may be tracedfrom buttery through coil of the relay; its make con tact and left-hand armature and sequence switch'spring 12 of the sender, armature and contact of relay 10 and the coil of relay 9 to ground. ThlS circuit'hasa parallel' path to ground from the left-hand armature of the relay by Way of the upper right-hand contact of sequence switch-spring 13 and the switch springs 34 and-33150 ground. However, since the pawl 30 is resting in the first slot' ot-tlie group selected the 'contactbetween'the springs 33 and 34 i'sfo'p'ened as the sequence "switch is moved into its fifth p'osi t1on.*'- 1 In the fifth position of the sequence'switch a circuit is closedfor the clutch magnet36, which can" be traced from battery through the magnetfthe "lower contact ofs'equence switchspring 16and the make "contact and armature "ofrelay 14: to ground: The clutch magnet '36 in operating will presstherack 18 against the constantly rotating j power shaft 38; The brushcarriage will" therefore begin to 'move'np 'in the group selected toselect the desired set. of contacts the' s'e lcc'ted 'group. As the brushcontacts 20 mote past each set .of stationary"contacts of the bank 21', the pawl 30 will'ride into one of the slots in the rack offthesele'c'ted'group. As the pawl 30leaves each slot and rides upon the surface of the rack the contact between' springs 33"andf34, is closed and the circuit" through the i stepping 'r'elay' 9: of the sender is shunted ina manner isimilar' to;

thatdescribed for' groupselection;

I When the desircd-"n'umbeflo f impulses have beensen'fi toselect' the desired set'iof contacts of the selected group, which is co trolledbythenumber setup by the answeringoperator, on the sender mechanism, the last cOuntingreIay 10 of the sender'is operated and the fundamental circuit is opened at tbe'armature of the last. counting relay 10. At the same time, since the pawl 30 engages one of the slots of the .selected group the contact between the springs 33 and 34 is also opened. The circuit of relay 1 1 is, therefore, broken and the relay is deenergized and in its deenergized position a circuit is closed from the ground on its rigl1t-hand armature by way of its break contact, the lower left-hand contact of sequence switch spring 11 and the power magnet 10 of the sequence switch to battery. The sequence switch 'will, therefore, move into its sixteenth position. In this position of the sequence switch the talking strands of the calling cord are closed at sequence switch springs 40 and 41 and since the movable contacts 20 have been moved to connect with the desired stationary contacts of the contact bank, a circuit is closed to the called subscribers line. This circuit may be traced from battery through one winding of the repeating coil, sequence switch spring 40, the tip contact of the brush and contactbank throu'g'lnthe' calling 'subscribers loop and back "over the ring side of the line, the ring contact of the bank and brush and through the sequence switch spring-"4:1 and the other winding-of the repeating coil to battery. A circuit is also completed from batter r by way'of sequence-switch spring 42 through the cut-off 'rel-ayof the calling line to ground. This disasso cia tes the callingsubscribers signaling-apparatus from his line circuit."

"f When the subscribers have completed'their conversation' the operator will "remove the answering lug from its associated jack and thereby deen'ergize the sleeve relay 8. This \villclose-a.'circuitfrom the ground on. the armature ofsaid relay way of the upper right-hand contact of sequence switch spring 11' and the; power magnet offth'e "sequence switch to battery. The sequence switchwill @nsequenuy'move into its eighteenth positicn. laureeighteenth position of the se-' quence' switch a circuit is closedfr'om ground through the-release clutch magnet48 and the sequence switch spring 49 to ground. Consequently the release clutch magnet will pre s the rack 18 against the constantly driven power shaft50, a1'1d since this shaft revolves in a directiono'p'posite'to that of the shafts 19 and 38 the brushcarriagewill be returned to moms-1.. The release clutch magnet 48 in operating likewise'removes'the pawls 30 and 24 "fromthei'fifgaged slots by means of the arm 51 so that these-pawls will not interfere w ith fi'the return movement of the 'rack. When'thswitch has returned to its normal positioii'th'e normal sp'r'ingsse and 53 of the switch will be' elbsea, which'will complete a circuit from'g'roiind by way of these springs thro'ugh the'upper'right-hand contact of sequence switch spring 54 and the .power magnet 10 of the sequence switch to battery. This will move the sequence switch back to its first position and thus open the circuit of the release clutch magnet. The apparatus has now all been returned to its normal position and is in condition for another call.

. Obviously this invention is not limited to the specific embodiment herein shown and described, but is capable of many variations and applications without departing from its spirit and scope.

What is claimed is 1. In an automatic switch mechanism, having stationary and movable contacts, a circuit controllingthe movement of said movable controlling the primary movement of said mechanism, means operated during the primary movement to control said circuit,.a circuit controlling the secondary movement of said mechanism, and means operated duringthesecondary movement to,,lock said movable contacts in position andcontrol said second circuit. f U

- 3. In an automatic.switchingvinechanism, having stationary and.,movable contacts, a circuit controllin the movement ,of said movable contacts v 1n the selection; of stationary] contacts, and a pawl opera-ted in ,the movement of said. movable contacts to ,lock the same in position and control saidscircuit. 4; In .anautomatic switching mechanism, having a primary: and secondary movement, stationary and movable contacts, a circuit ntre i et th -Qu n an.. e em nt o sa mechanisnn; a l f pawl operated Q during, the primary movement to control said circuit, a circuit -controlling the secondarygrnovement of said mechanism, and a pawloperated dur-, ing ,the secondary movement to :lock. said movable. contacts i11-position and control said second circuit. f 1; I V, 5.. In an automaticswitch, a pluralityof stationary contacts, an element equipped with movable contacts coiiperating there with, means to advance said movable contacts;

to select a desired. set oftstationary contacts, a circu t adapted to control said movement,

and a single means operated by,n 1o ving, element to retain itm 1tsd1splacedpos1tion and to control said circuit.

(5. An automatic switch, having said statiopa-ry contacts, a circuit cont o ling the movement of said rack, and means operated by said rack to retain it in its displaced position and to control said circuit a.,

7. An automatic switch, having aqplurality of stationary contacts, a movable rack equipped with contacts to. cotiperate 'with said stationary eontacts,.a pawl which ensaid rack to select the desired contacts of the selected group, and a second pawl engaging a second series of said slots to maintain the contacts in the selected position and to control said second circuit.

9. In an automatic switch controlling system, the combination with stationary termi- 1ty of stationary contacts, a nugy alfl k.- equipped with contacts tqeofi mt igh nals, of. a; rack equipped with :terminals to cooperate with said stationary; terminals, .a constantly. rotating power shatt a magnetic clutch controlling the connection of said rack with said power.- shaft, av-circuit controlling said magnet and a pawl engaging a series of slots .in said I rack. adapted, to retain the rack in its displaced position and to control said circuit. H I: 1 i

10. In an Y autgmatie, switch controlling system, stationary [terminals idividedinto gro psva; rackvequipp dl w th t rmi l cooperate with said stationary terminals, a constantlyrotating power shaft, a magnetic clutch controlling =the-;connec tion of said, rack with ,-said..power1sha ft for,group selection,.a,1 circuit; controlling. said; magnet, to selectadesired group; apawl engaging a series. of slots insaid rack adapted to control said circuit, a geonst antlyarotating power shaftjor; individual contact selection, a nagt ci-c l tqhivcoe m i gxth con c o said .raclr rvith said power shaft ,for individual contact selectippgacircuit controlling the said fl fiondgmagnet and a ,pawlengaging a second: series oigslots insaid rack adapted to retain; the its f displaced position and t .1 on rol ai d.ci tc -,s-== -r 1 5, 1. l me s c ioni -sy m for a switchg-mechan sm, ha -ins. Pri a y a secondarymov enierrt, stationary contacts, movable contacts; cooperating, 13herewith,means operin tha r mara m ve ent i d m anism to elfectaprimary selection, a circuit controlling the secopdarymovement oi said n ch n -sma nessan means see bythe overthrow, of the movable contacts .resulting, from,the primary selection to position said ,contacts and prepare the circuit controlljngithese condary movement.

: In a controllingsystem for switching echanism, having primary and secondary movemenhfstationary contact springs divided .i nto, group's, movable contact springs cooperating with 7 said "stationary contacts, means operated in the primary movement of said switch to select a, desired group of stationary contacts, .a circuit controlling the secondary movement of said switch to select a. particular set of contacts in the group selected, and means operated by the overthrow of said movable contacts resulting from the group selection to positionsa'id movable contacts and prepare the circuit controlling the individual contact selection.

13. In an automatic switch controlling system, stationary terminals divided into groups, a switch carriage carrying terminals to cooperate with said stationary terminals, a constantlyrotating power shaft for group selection, amagnetic clutch controlling the connection of said switch carriage with said power shaft for group selection, means operable to control said magnetic clutch to select the desired, group, constantly rotating power shaft for individual contact selection, a magnetic clutch controlling the connection of said switch carriage With said power shaft for individual contact selection, a circuit controlling the said second magnet, and means operated by the overthrow of said brush carriage following the group selection to position the brush carriage and prepare the controlling circuit of said magnetic clutch for individual contact selection.

In witness whereof, I hereunto subscribe my name this 242th day'of January A. D.,

ALBEN E. LUNDELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 6.. 

